Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * cdc-acm.c | |
3 | * | |
4 | * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de> | |
5 | * Copyright (c) 1999 Pavel Machek <pavel@suse.cz> | |
6 | * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com> | |
7 | * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz> | |
8 | * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name> | |
61a87adf | 9 | * Copyright (c) 2005 David Kubicek <dave@awk.cz> |
1da177e4 LT |
10 | * |
11 | * USB Abstract Control Model driver for USB modems and ISDN adapters | |
12 | * | |
13 | * Sponsored by SuSE | |
14 | * | |
15 | * ChangeLog: | |
16 | * v0.9 - thorough cleaning, URBification, almost a rewrite | |
17 | * v0.10 - some more cleanups | |
18 | * v0.11 - fixed flow control, read error doesn't stop reads | |
19 | * v0.12 - added TIOCM ioctls, added break handling, made struct acm kmalloced | |
20 | * v0.13 - added termios, added hangup | |
21 | * v0.14 - sized down struct acm | |
22 | * v0.15 - fixed flow control again - characters could be lost | |
23 | * v0.16 - added code for modems with swapped data and control interfaces | |
24 | * v0.17 - added new style probing | |
25 | * v0.18 - fixed new style probing for devices with more configurations | |
26 | * v0.19 - fixed CLOCAL handling (thanks to Richard Shih-Ping Chan) | |
27 | * v0.20 - switched to probing on interface (rather than device) class | |
28 | * v0.21 - revert to probing on device for devices with multiple configs | |
29 | * v0.22 - probe only the control interface. if usbcore doesn't choose the | |
30 | * config we want, sysadmin changes bConfigurationValue in sysfs. | |
31 | * v0.23 - use softirq for rx processing, as needed by tty layer | |
32 | * v0.24 - change probe method to evaluate CDC union descriptor | |
61a87adf | 33 | * v0.25 - downstream tasks paralelized to maximize throughput |
e4cf3aa8 | 34 | * v0.26 - multiple write urbs, writesize increased |
1da177e4 LT |
35 | */ |
36 | ||
37 | /* | |
38 | * This program is free software; you can redistribute it and/or modify | |
39 | * it under the terms of the GNU General Public License as published by | |
40 | * the Free Software Foundation; either version 2 of the License, or | |
41 | * (at your option) any later version. | |
42 | * | |
43 | * This program is distributed in the hope that it will be useful, | |
44 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
45 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
46 | * GNU General Public License for more details. | |
47 | * | |
48 | * You should have received a copy of the GNU General Public License | |
49 | * along with this program; if not, write to the Free Software | |
50 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
51 | */ | |
52 | ||
53 | #undef DEBUG | |
e5fbab51 | 54 | #undef VERBOSE_DEBUG |
1da177e4 LT |
55 | |
56 | #include <linux/kernel.h> | |
57 | #include <linux/errno.h> | |
58 | #include <linux/init.h> | |
59 | #include <linux/slab.h> | |
60 | #include <linux/tty.h> | |
61 | #include <linux/tty_driver.h> | |
62 | #include <linux/tty_flip.h> | |
63 | #include <linux/module.h> | |
4186ecf8 | 64 | #include <linux/mutex.h> |
1da177e4 LT |
65 | #include <asm/uaccess.h> |
66 | #include <linux/usb.h> | |
a8c28f23 | 67 | #include <linux/usb/cdc.h> |
1da177e4 LT |
68 | #include <asm/byteorder.h> |
69 | #include <asm/unaligned.h> | |
61a87adf | 70 | #include <linux/list.h> |
1da177e4 LT |
71 | |
72 | #include "cdc-acm.h" | |
73 | ||
e5fbab51 DB |
74 | |
75 | #define ACM_CLOSE_TIMEOUT 15 /* seconds to let writes drain */ | |
76 | ||
1da177e4 LT |
77 | /* |
78 | * Version Information | |
79 | */ | |
e4cf3aa8 | 80 | #define DRIVER_VERSION "v0.26" |
61a87adf | 81 | #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek" |
1da177e4 LT |
82 | #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" |
83 | ||
84 | static struct usb_driver acm_driver; | |
85 | static struct tty_driver *acm_tty_driver; | |
86 | static struct acm *acm_table[ACM_TTY_MINORS]; | |
87 | ||
4186ecf8 | 88 | static DEFINE_MUTEX(open_mutex); |
1da177e4 LT |
89 | |
90 | #define ACM_READY(acm) (acm && acm->dev && acm->used) | |
91 | ||
e5fbab51 DB |
92 | #ifdef VERBOSE_DEBUG |
93 | #define verbose 1 | |
94 | #else | |
95 | #define verbose 0 | |
96 | #endif | |
97 | ||
1da177e4 LT |
98 | /* |
99 | * Functions for ACM control messages. | |
100 | */ | |
101 | ||
102 | static int acm_ctrl_msg(struct acm *acm, int request, int value, void *buf, int len) | |
103 | { | |
104 | int retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), | |
105 | request, USB_RT_ACM, value, | |
106 | acm->control->altsetting[0].desc.bInterfaceNumber, | |
107 | buf, len, 5000); | |
108 | dbg("acm_control_msg: rq: 0x%02x val: %#x len: %#x result: %d", request, value, len, retval); | |
109 | return retval < 0 ? retval : 0; | |
110 | } | |
111 | ||
112 | /* devices aren't required to support these requests. | |
113 | * the cdc acm descriptor tells whether they do... | |
114 | */ | |
115 | #define acm_set_control(acm, control) \ | |
116 | acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0) | |
117 | #define acm_set_line(acm, line) \ | |
118 | acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) | |
119 | #define acm_send_break(acm, ms) \ | |
120 | acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) | |
121 | ||
884b600f ON |
122 | /* |
123 | * Write buffer management. | |
124 | * All of these assume proper locks taken by the caller. | |
125 | */ | |
126 | ||
127 | static int acm_wb_alloc(struct acm *acm) | |
128 | { | |
129 | int i, wbn; | |
130 | struct acm_wb *wb; | |
131 | ||
e4cf3aa8 | 132 | wbn = 0; |
884b600f ON |
133 | i = 0; |
134 | for (;;) { | |
135 | wb = &acm->wb[wbn]; | |
136 | if (!wb->use) { | |
137 | wb->use = 1; | |
138 | return wbn; | |
139 | } | |
86478944 ON |
140 | wbn = (wbn + 1) % ACM_NW; |
141 | if (++i >= ACM_NW) | |
884b600f ON |
142 | return -1; |
143 | } | |
144 | } | |
145 | ||
884b600f ON |
146 | static int acm_wb_is_avail(struct acm *acm) |
147 | { | |
148 | int i, n; | |
e5fbab51 | 149 | unsigned long flags; |
884b600f | 150 | |
86478944 | 151 | n = ACM_NW; |
e5fbab51 | 152 | spin_lock_irqsave(&acm->write_lock, flags); |
86478944 ON |
153 | for (i = 0; i < ACM_NW; i++) { |
154 | n -= acm->wb[i].use; | |
884b600f | 155 | } |
e5fbab51 | 156 | spin_unlock_irqrestore(&acm->write_lock, flags); |
884b600f ON |
157 | return n; |
158 | } | |
159 | ||
884b600f ON |
160 | /* |
161 | * Finish write. | |
162 | */ | |
e4cf3aa8 | 163 | static void acm_write_done(struct acm *acm, struct acm_wb *wb) |
884b600f ON |
164 | { |
165 | unsigned long flags; | |
884b600f ON |
166 | |
167 | spin_lock_irqsave(&acm->write_lock, flags); | |
e4cf3aa8 | 168 | wb->use = 0; |
11ea859d | 169 | acm->transmitting--; |
884b600f ON |
170 | spin_unlock_irqrestore(&acm->write_lock, flags); |
171 | } | |
172 | ||
173 | /* | |
174 | * Poke write. | |
11ea859d ON |
175 | * |
176 | * the caller is responsible for locking | |
884b600f | 177 | */ |
11ea859d ON |
178 | |
179 | static int acm_start_wb(struct acm *acm, struct acm_wb *wb) | |
180 | { | |
181 | int rc; | |
182 | ||
183 | acm->transmitting++; | |
184 | ||
185 | wb->urb->transfer_buffer = wb->buf; | |
186 | wb->urb->transfer_dma = wb->dmah; | |
187 | wb->urb->transfer_buffer_length = wb->len; | |
188 | wb->urb->dev = acm->dev; | |
189 | ||
190 | if ((rc = usb_submit_urb(wb->urb, GFP_ATOMIC)) < 0) { | |
191 | dbg("usb_submit_urb(write bulk) failed: %d", rc); | |
192 | acm_write_done(acm, wb); | |
193 | } | |
194 | return rc; | |
195 | } | |
196 | ||
e4cf3aa8 | 197 | static int acm_write_start(struct acm *acm, int wbn) |
884b600f ON |
198 | { |
199 | unsigned long flags; | |
934da463 | 200 | struct acm_wb *wb = &acm->wb[wbn]; |
884b600f ON |
201 | int rc; |
202 | ||
203 | spin_lock_irqsave(&acm->write_lock, flags); | |
204 | if (!acm->dev) { | |
934da463 | 205 | wb->use = 0; |
884b600f ON |
206 | spin_unlock_irqrestore(&acm->write_lock, flags); |
207 | return -ENODEV; | |
208 | } | |
209 | ||
11ea859d ON |
210 | dbg("%s susp_count: %d", __func__, acm->susp_count); |
211 | if (acm->susp_count) { | |
11ea859d | 212 | acm->delayed_wb = wb; |
11ea859d ON |
213 | schedule_work(&acm->waker); |
214 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
215 | return 0; /* A white lie */ | |
216 | } | |
217 | usb_mark_last_busy(acm->dev); | |
218 | ||
11ea859d | 219 | rc = acm_start_wb(acm, wb); |
884b600f ON |
220 | spin_unlock_irqrestore(&acm->write_lock, flags); |
221 | ||
884b600f | 222 | return rc; |
11ea859d | 223 | |
884b600f | 224 | } |
c4cabd28 ON |
225 | /* |
226 | * attributes exported through sysfs | |
227 | */ | |
228 | static ssize_t show_caps | |
229 | (struct device *dev, struct device_attribute *attr, char *buf) | |
230 | { | |
231 | struct usb_interface *intf = to_usb_interface(dev); | |
232 | struct acm *acm = usb_get_intfdata(intf); | |
233 | ||
234 | return sprintf(buf, "%d", acm->ctrl_caps); | |
235 | } | |
236 | static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL); | |
237 | ||
238 | static ssize_t show_country_codes | |
239 | (struct device *dev, struct device_attribute *attr, char *buf) | |
240 | { | |
241 | struct usb_interface *intf = to_usb_interface(dev); | |
242 | struct acm *acm = usb_get_intfdata(intf); | |
243 | ||
244 | memcpy(buf, acm->country_codes, acm->country_code_size); | |
245 | return acm->country_code_size; | |
246 | } | |
247 | ||
248 | static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL); | |
249 | ||
250 | static ssize_t show_country_rel_date | |
251 | (struct device *dev, struct device_attribute *attr, char *buf) | |
252 | { | |
253 | struct usb_interface *intf = to_usb_interface(dev); | |
254 | struct acm *acm = usb_get_intfdata(intf); | |
255 | ||
256 | return sprintf(buf, "%d", acm->country_rel_date); | |
257 | } | |
884b600f | 258 | |
c4cabd28 | 259 | static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL); |
1da177e4 LT |
260 | /* |
261 | * Interrupt handlers for various ACM device responses | |
262 | */ | |
263 | ||
264 | /* control interface reports status changes with "interrupt" transfers */ | |
7d12e780 | 265 | static void acm_ctrl_irq(struct urb *urb) |
1da177e4 LT |
266 | { |
267 | struct acm *acm = urb->context; | |
268 | struct usb_cdc_notification *dr = urb->transfer_buffer; | |
269 | unsigned char *data; | |
270 | int newctrl; | |
185d4058 GKH |
271 | int retval; |
272 | int status = urb->status; | |
1da177e4 | 273 | |
185d4058 | 274 | switch (status) { |
1da177e4 LT |
275 | case 0: |
276 | /* success */ | |
277 | break; | |
278 | case -ECONNRESET: | |
279 | case -ENOENT: | |
280 | case -ESHUTDOWN: | |
281 | /* this urb is terminated, clean up */ | |
441b62c1 | 282 | dbg("%s - urb shutting down with status: %d", __func__, status); |
1da177e4 LT |
283 | return; |
284 | default: | |
441b62c1 | 285 | dbg("%s - nonzero urb status received: %d", __func__, status); |
1da177e4 LT |
286 | goto exit; |
287 | } | |
288 | ||
289 | if (!ACM_READY(acm)) | |
290 | goto exit; | |
291 | ||
292 | data = (unsigned char *)(dr + 1); | |
293 | switch (dr->bNotificationType) { | |
294 | ||
295 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: | |
296 | ||
297 | dbg("%s network", dr->wValue ? "connected to" : "disconnected from"); | |
298 | break; | |
299 | ||
300 | case USB_CDC_NOTIFY_SERIAL_STATE: | |
301 | ||
a5abdeaf | 302 | newctrl = get_unaligned_le16(data); |
1da177e4 LT |
303 | |
304 | if (acm->tty && !acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { | |
305 | dbg("calling hangup"); | |
306 | tty_hangup(acm->tty); | |
307 | } | |
308 | ||
309 | acm->ctrlin = newctrl; | |
310 | ||
311 | dbg("input control lines: dcd%c dsr%c break%c ring%c framing%c parity%c overrun%c", | |
312 | acm->ctrlin & ACM_CTRL_DCD ? '+' : '-', acm->ctrlin & ACM_CTRL_DSR ? '+' : '-', | |
313 | acm->ctrlin & ACM_CTRL_BRK ? '+' : '-', acm->ctrlin & ACM_CTRL_RI ? '+' : '-', | |
314 | acm->ctrlin & ACM_CTRL_FRAMING ? '+' : '-', acm->ctrlin & ACM_CTRL_PARITY ? '+' : '-', | |
315 | acm->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-'); | |
316 | ||
317 | break; | |
318 | ||
319 | default: | |
320 | dbg("unknown notification %d received: index %d len %d data0 %d data1 %d", | |
321 | dr->bNotificationType, dr->wIndex, | |
322 | dr->wLength, data[0], data[1]); | |
323 | break; | |
324 | } | |
325 | exit: | |
11ea859d | 326 | usb_mark_last_busy(acm->dev); |
185d4058 GKH |
327 | retval = usb_submit_urb (urb, GFP_ATOMIC); |
328 | if (retval) | |
1da177e4 | 329 | err ("%s - usb_submit_urb failed with result %d", |
441b62c1 | 330 | __func__, retval); |
1da177e4 LT |
331 | } |
332 | ||
333 | /* data interface returns incoming bytes, or we got unthrottled */ | |
7d12e780 | 334 | static void acm_read_bulk(struct urb *urb) |
1da177e4 | 335 | { |
61a87adf DK |
336 | struct acm_rb *buf; |
337 | struct acm_ru *rcv = urb->context; | |
338 | struct acm *acm = rcv->instance; | |
86478944 | 339 | int status = urb->status; |
185d4058 GKH |
340 | |
341 | dbg("Entering acm_read_bulk with status %d", status); | |
1da177e4 | 342 | |
11ea859d ON |
343 | if (!ACM_READY(acm)) { |
344 | dev_dbg(&acm->data->dev, "Aborting, acm not ready"); | |
1da177e4 | 345 | return; |
11ea859d ON |
346 | } |
347 | usb_mark_last_busy(acm->dev); | |
1da177e4 | 348 | |
86478944 | 349 | if (status) |
898eb71c | 350 | dev_dbg(&acm->data->dev, "bulk rx status %d\n", status); |
1da177e4 | 351 | |
61a87adf DK |
352 | buf = rcv->buffer; |
353 | buf->size = urb->actual_length; | |
354 | ||
86478944 ON |
355 | if (likely(status == 0)) { |
356 | spin_lock(&acm->read_lock); | |
11ea859d | 357 | acm->processing++; |
86478944 ON |
358 | list_add_tail(&rcv->list, &acm->spare_read_urbs); |
359 | list_add_tail(&buf->list, &acm->filled_read_bufs); | |
360 | spin_unlock(&acm->read_lock); | |
361 | } else { | |
362 | /* we drop the buffer due to an error */ | |
363 | spin_lock(&acm->read_lock); | |
364 | list_add_tail(&rcv->list, &acm->spare_read_urbs); | |
365 | list_add(&buf->list, &acm->spare_read_bufs); | |
366 | spin_unlock(&acm->read_lock); | |
367 | /* nevertheless the tasklet must be kicked unconditionally | |
368 | so the queue cannot dry up */ | |
369 | } | |
11ea859d ON |
370 | if (likely(!acm->susp_count)) |
371 | tasklet_schedule(&acm->urb_task); | |
1da177e4 LT |
372 | } |
373 | ||
374 | static void acm_rx_tasklet(unsigned long _acm) | |
375 | { | |
376 | struct acm *acm = (void *)_acm; | |
61a87adf | 377 | struct acm_rb *buf; |
1da177e4 | 378 | struct tty_struct *tty = acm->tty; |
61a87adf | 379 | struct acm_ru *rcv; |
762f007b | 380 | unsigned long flags; |
ca79b7b4 | 381 | unsigned char throttled; |
11ea859d | 382 | |
1da177e4 LT |
383 | dbg("Entering acm_rx_tasklet"); |
384 | ||
ca79b7b4 | 385 | if (!ACM_READY(acm)) |
11ea859d ON |
386 | { |
387 | dbg("acm_rx_tasklet: ACM not ready"); | |
ca79b7b4 | 388 | return; |
11ea859d | 389 | } |
ca79b7b4 | 390 | |
834dbca5 | 391 | spin_lock_irqsave(&acm->throttle_lock, flags); |
ca79b7b4 | 392 | throttled = acm->throttle; |
834dbca5 | 393 | spin_unlock_irqrestore(&acm->throttle_lock, flags); |
ca79b7b4 | 394 | if (throttled) |
11ea859d ON |
395 | { |
396 | dbg("acm_rx_tasklet: throttled"); | |
61a87adf | 397 | return; |
11ea859d | 398 | } |
61a87adf DK |
399 | |
400 | next_buffer: | |
762f007b | 401 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 402 | if (list_empty(&acm->filled_read_bufs)) { |
762f007b | 403 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf | 404 | goto urbs; |
1da177e4 | 405 | } |
61a87adf DK |
406 | buf = list_entry(acm->filled_read_bufs.next, |
407 | struct acm_rb, list); | |
408 | list_del(&buf->list); | |
762f007b | 409 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf | 410 | |
3dd2ae81 | 411 | dbg("acm_rx_tasklet: procesing buf 0x%p, size = %d", buf, buf->size); |
61a87adf | 412 | |
33f0f88f | 413 | tty_buffer_request_room(tty, buf->size); |
834dbca5 | 414 | spin_lock_irqsave(&acm->throttle_lock, flags); |
ca79b7b4 | 415 | throttled = acm->throttle; |
834dbca5 | 416 | spin_unlock_irqrestore(&acm->throttle_lock, flags); |
ca79b7b4 | 417 | if (!throttled) |
33f0f88f | 418 | tty_insert_flip_string(tty, buf->base, buf->size); |
61a87adf | 419 | tty_flip_buffer_push(tty); |
1da177e4 | 420 | |
ca79b7b4 ON |
421 | if (throttled) { |
422 | dbg("Throttling noticed"); | |
762f007b | 423 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 424 | list_add(&buf->list, &acm->filled_read_bufs); |
762f007b | 425 | spin_unlock_irqrestore(&acm->read_lock, flags); |
1da177e4 LT |
426 | return; |
427 | } | |
1da177e4 | 428 | |
762f007b | 429 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 430 | list_add(&buf->list, &acm->spare_read_bufs); |
762f007b | 431 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf DK |
432 | goto next_buffer; |
433 | ||
434 | urbs: | |
435 | while (!list_empty(&acm->spare_read_bufs)) { | |
762f007b | 436 | spin_lock_irqsave(&acm->read_lock, flags); |
61a87adf | 437 | if (list_empty(&acm->spare_read_urbs)) { |
11ea859d | 438 | acm->processing = 0; |
762f007b | 439 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf DK |
440 | return; |
441 | } | |
442 | rcv = list_entry(acm->spare_read_urbs.next, | |
443 | struct acm_ru, list); | |
444 | list_del(&rcv->list); | |
762f007b | 445 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf DK |
446 | |
447 | buf = list_entry(acm->spare_read_bufs.next, | |
448 | struct acm_rb, list); | |
449 | list_del(&buf->list); | |
450 | ||
451 | rcv->buffer = buf; | |
452 | ||
453 | usb_fill_bulk_urb(rcv->urb, acm->dev, | |
454 | acm->rx_endpoint, | |
455 | buf->base, | |
456 | acm->readsize, | |
457 | acm_read_bulk, rcv); | |
458 | rcv->urb->transfer_dma = buf->dma; | |
459 | rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
460 | ||
61a87adf DK |
461 | /* This shouldn't kill the driver as unsuccessful URBs are returned to the |
462 | free-urbs-pool and resubmited ASAP */ | |
11ea859d ON |
463 | spin_lock_irqsave(&acm->read_lock, flags); |
464 | if (acm->susp_count || usb_submit_urb(rcv->urb, GFP_ATOMIC) < 0) { | |
61a87adf | 465 | list_add(&buf->list, &acm->spare_read_bufs); |
61a87adf | 466 | list_add(&rcv->list, &acm->spare_read_urbs); |
11ea859d | 467 | acm->processing = 0; |
762f007b | 468 | spin_unlock_irqrestore(&acm->read_lock, flags); |
61a87adf | 469 | return; |
11ea859d ON |
470 | } else { |
471 | spin_unlock_irqrestore(&acm->read_lock, flags); | |
472 | dbg("acm_rx_tasklet: sending urb 0x%p, rcv 0x%p, buf 0x%p", rcv->urb, rcv, buf); | |
61a87adf DK |
473 | } |
474 | } | |
11ea859d ON |
475 | spin_lock_irqsave(&acm->read_lock, flags); |
476 | acm->processing = 0; | |
477 | spin_unlock_irqrestore(&acm->read_lock, flags); | |
1da177e4 LT |
478 | } |
479 | ||
480 | /* data interface wrote those outgoing bytes */ | |
7d12e780 | 481 | static void acm_write_bulk(struct urb *urb) |
1da177e4 | 482 | { |
cdc97792 | 483 | struct acm_wb *wb = urb->context; |
e5fbab51 | 484 | struct acm *acm = wb->instance; |
1da177e4 | 485 | |
e5fbab51 DB |
486 | if (verbose || urb->status |
487 | || (urb->actual_length != urb->transfer_buffer_length)) | |
488 | dev_dbg(&acm->data->dev, "tx %d/%d bytes -- > %d\n", | |
489 | urb->actual_length, | |
490 | urb->transfer_buffer_length, | |
491 | urb->status); | |
1da177e4 | 492 | |
e4cf3aa8 | 493 | acm_write_done(acm, wb); |
884b600f ON |
494 | if (ACM_READY(acm)) |
495 | schedule_work(&acm->work); | |
e5fbab51 DB |
496 | else |
497 | wake_up_interruptible(&acm->drain_wait); | |
1da177e4 LT |
498 | } |
499 | ||
c4028958 | 500 | static void acm_softint(struct work_struct *work) |
1da177e4 | 501 | { |
c4028958 | 502 | struct acm *acm = container_of(work, struct acm, work); |
e5fbab51 DB |
503 | |
504 | dev_vdbg(&acm->data->dev, "tx work\n"); | |
1da177e4 LT |
505 | if (!ACM_READY(acm)) |
506 | return; | |
507 | tty_wakeup(acm->tty); | |
508 | } | |
509 | ||
11ea859d ON |
510 | static void acm_waker(struct work_struct *waker) |
511 | { | |
512 | struct acm *acm = container_of(waker, struct acm, waker); | |
11ea859d ON |
513 | int rv; |
514 | ||
515 | rv = usb_autopm_get_interface(acm->control); | |
516 | if (rv < 0) { | |
517 | err("Autopm failure in %s", __func__); | |
518 | return; | |
519 | } | |
520 | if (acm->delayed_wb) { | |
521 | acm_start_wb(acm, acm->delayed_wb); | |
522 | acm->delayed_wb = NULL; | |
523 | } | |
11ea859d ON |
524 | usb_autopm_put_interface(acm->control); |
525 | } | |
526 | ||
1da177e4 LT |
527 | /* |
528 | * TTY handlers | |
529 | */ | |
530 | ||
531 | static int acm_tty_open(struct tty_struct *tty, struct file *filp) | |
532 | { | |
533 | struct acm *acm; | |
534 | int rv = -EINVAL; | |
61a87adf | 535 | int i; |
3dd2ae81 | 536 | dbg("Entering acm_tty_open."); |
4186ecf8 AV |
537 | |
538 | mutex_lock(&open_mutex); | |
1da177e4 LT |
539 | |
540 | acm = acm_table[tty->index]; | |
541 | if (!acm || !acm->dev) | |
542 | goto err_out; | |
543 | else | |
544 | rv = 0; | |
545 | ||
28d1dfad | 546 | set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); |
1da177e4 LT |
547 | tty->driver_data = acm; |
548 | acm->tty = tty; | |
549 | ||
61a87adf DK |
550 | /* force low_latency on so that our tty_push actually forces the data through, |
551 | otherwise it is scheduled, and with high data rates data can get lost. */ | |
552 | tty->low_latency = 1; | |
1da177e4 | 553 | |
94409cc1 ON |
554 | if (usb_autopm_get_interface(acm->control) < 0) |
555 | goto early_bail; | |
11ea859d ON |
556 | else |
557 | acm->control->needs_remote_wakeup = 1; | |
1365baf7 ON |
558 | |
559 | mutex_lock(&acm->mutex); | |
1da177e4 | 560 | if (acm->used++) { |
1365baf7 | 561 | usb_autopm_put_interface(acm->control); |
1da177e4 LT |
562 | goto done; |
563 | } | |
564 | ||
1365baf7 | 565 | |
1da177e4 LT |
566 | acm->ctrlurb->dev = acm->dev; |
567 | if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) { | |
568 | dbg("usb_submit_urb(ctrl irq) failed"); | |
569 | goto bail_out; | |
570 | } | |
571 | ||
ca79b7b4 ON |
572 | if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS) && |
573 | (acm->ctrl_caps & USB_CDC_CAP_LINE)) | |
1da177e4 | 574 | goto full_bailout; |
11ea859d | 575 | usb_autopm_put_interface(acm->control); |
1da177e4 | 576 | |
61a87adf DK |
577 | INIT_LIST_HEAD(&acm->spare_read_urbs); |
578 | INIT_LIST_HEAD(&acm->spare_read_bufs); | |
579 | INIT_LIST_HEAD(&acm->filled_read_bufs); | |
86478944 | 580 | for (i = 0; i < acm->rx_buflimit; i++) { |
61a87adf DK |
581 | list_add(&(acm->ru[i].list), &acm->spare_read_urbs); |
582 | } | |
86478944 | 583 | for (i = 0; i < acm->rx_buflimit; i++) { |
61a87adf DK |
584 | list_add(&(acm->rb[i].list), &acm->spare_read_bufs); |
585 | } | |
586 | ||
ca79b7b4 ON |
587 | acm->throttle = 0; |
588 | ||
61a87adf | 589 | tasklet_schedule(&acm->urb_task); |
1da177e4 LT |
590 | |
591 | done: | |
1365baf7 | 592 | mutex_unlock(&acm->mutex); |
74573ee7 | 593 | err_out: |
94409cc1 | 594 | mutex_unlock(&open_mutex); |
1da177e4 LT |
595 | return rv; |
596 | ||
597 | full_bailout: | |
1da177e4 LT |
598 | usb_kill_urb(acm->ctrlurb); |
599 | bail_out: | |
1365baf7 | 600 | usb_autopm_put_interface(acm->control); |
1da177e4 | 601 | acm->used--; |
1365baf7 | 602 | mutex_unlock(&acm->mutex); |
94409cc1 ON |
603 | early_bail: |
604 | mutex_unlock(&open_mutex); | |
1da177e4 LT |
605 | return -EIO; |
606 | } | |
607 | ||
83ef344a | 608 | static void acm_tty_unregister(struct acm *acm) |
609 | { | |
86478944 | 610 | int i,nr; |
61a87adf | 611 | |
86478944 | 612 | nr = acm->rx_buflimit; |
83ef344a | 613 | tty_unregister_device(acm_tty_driver, acm->minor); |
614 | usb_put_intf(acm->control); | |
615 | acm_table[acm->minor] = NULL; | |
616 | usb_free_urb(acm->ctrlurb); | |
e4cf3aa8 DE |
617 | for (i = 0; i < ACM_NW; i++) |
618 | usb_free_urb(acm->wb[i].urb); | |
86478944 | 619 | for (i = 0; i < nr; i++) |
61a87adf | 620 | usb_free_urb(acm->ru[i].urb); |
c4cabd28 | 621 | kfree(acm->country_codes); |
83ef344a | 622 | kfree(acm); |
623 | } | |
624 | ||
e5fbab51 DB |
625 | static int acm_tty_chars_in_buffer(struct tty_struct *tty); |
626 | ||
1da177e4 LT |
627 | static void acm_tty_close(struct tty_struct *tty, struct file *filp) |
628 | { | |
629 | struct acm *acm = tty->driver_data; | |
86478944 | 630 | int i,nr; |
1da177e4 LT |
631 | |
632 | if (!acm || !acm->used) | |
633 | return; | |
634 | ||
86478944 | 635 | nr = acm->rx_buflimit; |
4186ecf8 | 636 | mutex_lock(&open_mutex); |
1da177e4 LT |
637 | if (!--acm->used) { |
638 | if (acm->dev) { | |
11ea859d | 639 | usb_autopm_get_interface(acm->control); |
1da177e4 | 640 | acm_set_control(acm, acm->ctrlout = 0); |
e5fbab51 DB |
641 | |
642 | /* try letting the last writes drain naturally */ | |
643 | wait_event_interruptible_timeout(acm->drain_wait, | |
644 | (ACM_NW == acm_wb_is_avail(acm)) | |
645 | || !acm->dev, | |
646 | ACM_CLOSE_TIMEOUT * HZ); | |
647 | ||
1da177e4 | 648 | usb_kill_urb(acm->ctrlurb); |
e4cf3aa8 DE |
649 | for (i = 0; i < ACM_NW; i++) |
650 | usb_kill_urb(acm->wb[i].urb); | |
86478944 | 651 | for (i = 0; i < nr; i++) |
61a87adf | 652 | usb_kill_urb(acm->ru[i].urb); |
11ea859d | 653 | acm->control->needs_remote_wakeup = 0; |
1365baf7 | 654 | usb_autopm_put_interface(acm->control); |
83ef344a | 655 | } else |
656 | acm_tty_unregister(acm); | |
1da177e4 | 657 | } |
4186ecf8 | 658 | mutex_unlock(&open_mutex); |
1da177e4 LT |
659 | } |
660 | ||
661 | static int acm_tty_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
662 | { | |
663 | struct acm *acm = tty->driver_data; | |
664 | int stat; | |
884b600f ON |
665 | unsigned long flags; |
666 | int wbn; | |
667 | struct acm_wb *wb; | |
668 | ||
3dd2ae81 | 669 | dbg("Entering acm_tty_write to write %d bytes,", count); |
1da177e4 LT |
670 | |
671 | if (!ACM_READY(acm)) | |
672 | return -EINVAL; | |
1da177e4 LT |
673 | if (!count) |
674 | return 0; | |
675 | ||
884b600f ON |
676 | spin_lock_irqsave(&acm->write_lock, flags); |
677 | if ((wbn = acm_wb_alloc(acm)) < 0) { | |
678 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
884b600f ON |
679 | return 0; |
680 | } | |
681 | wb = &acm->wb[wbn]; | |
1da177e4 | 682 | |
884b600f | 683 | count = (count > acm->writesize) ? acm->writesize : count; |
1da177e4 | 684 | dbg("Get %d bytes...", count); |
884b600f ON |
685 | memcpy(wb->buf, buf, count); |
686 | wb->len = count; | |
687 | spin_unlock_irqrestore(&acm->write_lock, flags); | |
1da177e4 | 688 | |
e4cf3aa8 | 689 | if ((stat = acm_write_start(acm, wbn)) < 0) |
1da177e4 | 690 | return stat; |
1da177e4 LT |
691 | return count; |
692 | } | |
693 | ||
694 | static int acm_tty_write_room(struct tty_struct *tty) | |
695 | { | |
696 | struct acm *acm = tty->driver_data; | |
697 | if (!ACM_READY(acm)) | |
698 | return -EINVAL; | |
884b600f ON |
699 | /* |
700 | * Do not let the line discipline to know that we have a reserve, | |
701 | * or it might get too enthusiastic. | |
702 | */ | |
934da463 | 703 | return acm_wb_is_avail(acm) ? acm->writesize : 0; |
1da177e4 LT |
704 | } |
705 | ||
706 | static int acm_tty_chars_in_buffer(struct tty_struct *tty) | |
707 | { | |
708 | struct acm *acm = tty->driver_data; | |
709 | if (!ACM_READY(acm)) | |
710 | return -EINVAL; | |
884b600f ON |
711 | /* |
712 | * This is inaccurate (overcounts), but it works. | |
713 | */ | |
86478944 | 714 | return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; |
1da177e4 LT |
715 | } |
716 | ||
717 | static void acm_tty_throttle(struct tty_struct *tty) | |
718 | { | |
719 | struct acm *acm = tty->driver_data; | |
720 | if (!ACM_READY(acm)) | |
721 | return; | |
722 | spin_lock_bh(&acm->throttle_lock); | |
723 | acm->throttle = 1; | |
724 | spin_unlock_bh(&acm->throttle_lock); | |
725 | } | |
726 | ||
727 | static void acm_tty_unthrottle(struct tty_struct *tty) | |
728 | { | |
729 | struct acm *acm = tty->driver_data; | |
730 | if (!ACM_READY(acm)) | |
731 | return; | |
732 | spin_lock_bh(&acm->throttle_lock); | |
733 | acm->throttle = 0; | |
734 | spin_unlock_bh(&acm->throttle_lock); | |
61a87adf | 735 | tasklet_schedule(&acm->urb_task); |
1da177e4 LT |
736 | } |
737 | ||
9e98966c | 738 | static int acm_tty_break_ctl(struct tty_struct *tty, int state) |
1da177e4 LT |
739 | { |
740 | struct acm *acm = tty->driver_data; | |
9e98966c | 741 | int retval; |
1da177e4 | 742 | if (!ACM_READY(acm)) |
9e98966c AC |
743 | return -EINVAL; |
744 | retval = acm_send_break(acm, state ? 0xffff : 0); | |
745 | if (retval < 0) | |
1da177e4 | 746 | dbg("send break failed"); |
9e98966c | 747 | return retval; |
1da177e4 LT |
748 | } |
749 | ||
750 | static int acm_tty_tiocmget(struct tty_struct *tty, struct file *file) | |
751 | { | |
752 | struct acm *acm = tty->driver_data; | |
753 | ||
754 | if (!ACM_READY(acm)) | |
755 | return -EINVAL; | |
756 | ||
757 | return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | | |
758 | (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | | |
759 | (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | | |
760 | (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | | |
761 | (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | | |
762 | TIOCM_CTS; | |
763 | } | |
764 | ||
765 | static int acm_tty_tiocmset(struct tty_struct *tty, struct file *file, | |
766 | unsigned int set, unsigned int clear) | |
767 | { | |
768 | struct acm *acm = tty->driver_data; | |
769 | unsigned int newctrl; | |
770 | ||
771 | if (!ACM_READY(acm)) | |
772 | return -EINVAL; | |
773 | ||
774 | newctrl = acm->ctrlout; | |
775 | set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); | |
776 | clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); | |
777 | ||
778 | newctrl = (newctrl & ~clear) | set; | |
779 | ||
780 | if (acm->ctrlout == newctrl) | |
781 | return 0; | |
782 | return acm_set_control(acm, acm->ctrlout = newctrl); | |
783 | } | |
784 | ||
785 | static int acm_tty_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) | |
786 | { | |
787 | struct acm *acm = tty->driver_data; | |
788 | ||
789 | if (!ACM_READY(acm)) | |
790 | return -EINVAL; | |
791 | ||
792 | return -ENOIOCTLCMD; | |
793 | } | |
794 | ||
4c4c9432 | 795 | static const __u32 acm_tty_speed[] = { |
1da177e4 LT |
796 | 0, 50, 75, 110, 134, 150, 200, 300, 600, |
797 | 1200, 1800, 2400, 4800, 9600, 19200, 38400, | |
798 | 57600, 115200, 230400, 460800, 500000, 576000, | |
799 | 921600, 1000000, 1152000, 1500000, 2000000, | |
800 | 2500000, 3000000, 3500000, 4000000 | |
801 | }; | |
802 | ||
4c4c9432 | 803 | static const __u8 acm_tty_size[] = { |
1da177e4 LT |
804 | 5, 6, 7, 8 |
805 | }; | |
806 | ||
606d099c | 807 | static void acm_tty_set_termios(struct tty_struct *tty, struct ktermios *termios_old) |
1da177e4 LT |
808 | { |
809 | struct acm *acm = tty->driver_data; | |
606d099c | 810 | struct ktermios *termios = tty->termios; |
1da177e4 LT |
811 | struct usb_cdc_line_coding newline; |
812 | int newctrl = acm->ctrlout; | |
813 | ||
814 | if (!ACM_READY(acm)) | |
815 | return; | |
816 | ||
817 | newline.dwDTERate = cpu_to_le32p(acm_tty_speed + | |
818 | (termios->c_cflag & CBAUD & ~CBAUDEX) + (termios->c_cflag & CBAUDEX ? 15 : 0)); | |
819 | newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; | |
820 | newline.bParityType = termios->c_cflag & PARENB ? | |
821 | (termios->c_cflag & PARODD ? 1 : 2) + (termios->c_cflag & CMSPAR ? 2 : 0) : 0; | |
822 | newline.bDataBits = acm_tty_size[(termios->c_cflag & CSIZE) >> 4]; | |
823 | ||
824 | acm->clocal = ((termios->c_cflag & CLOCAL) != 0); | |
825 | ||
826 | if (!newline.dwDTERate) { | |
827 | newline.dwDTERate = acm->line.dwDTERate; | |
828 | newctrl &= ~ACM_CTRL_DTR; | |
829 | } else newctrl |= ACM_CTRL_DTR; | |
830 | ||
831 | if (newctrl != acm->ctrlout) | |
832 | acm_set_control(acm, acm->ctrlout = newctrl); | |
833 | ||
834 | if (memcmp(&acm->line, &newline, sizeof newline)) { | |
835 | memcpy(&acm->line, &newline, sizeof newline); | |
836 | dbg("set line: %d %d %d %d", le32_to_cpu(newline.dwDTERate), | |
837 | newline.bCharFormat, newline.bParityType, | |
838 | newline.bDataBits); | |
839 | acm_set_line(acm, &acm->line); | |
840 | } | |
841 | } | |
842 | ||
843 | /* | |
844 | * USB probe and disconnect routines. | |
845 | */ | |
846 | ||
830f4021 | 847 | /* Little helpers: write/read buffers free */ |
884b600f ON |
848 | static void acm_write_buffers_free(struct acm *acm) |
849 | { | |
850 | int i; | |
851 | struct acm_wb *wb; | |
852 | ||
86478944 | 853 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { |
884b600f ON |
854 | usb_buffer_free(acm->dev, acm->writesize, wb->buf, wb->dmah); |
855 | } | |
856 | } | |
857 | ||
830f4021 ON |
858 | static void acm_read_buffers_free(struct acm *acm) |
859 | { | |
860 | struct usb_device *usb_dev = interface_to_usbdev(acm->control); | |
861 | int i, n = acm->rx_buflimit; | |
862 | ||
863 | for (i = 0; i < n; i++) | |
864 | usb_buffer_free(usb_dev, acm->readsize, acm->rb[i].base, acm->rb[i].dma); | |
865 | } | |
866 | ||
884b600f ON |
867 | /* Little helper: write buffers allocate */ |
868 | static int acm_write_buffers_alloc(struct acm *acm) | |
869 | { | |
870 | int i; | |
871 | struct acm_wb *wb; | |
872 | ||
86478944 | 873 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { |
884b600f ON |
874 | wb->buf = usb_buffer_alloc(acm->dev, acm->writesize, GFP_KERNEL, |
875 | &wb->dmah); | |
876 | if (!wb->buf) { | |
877 | while (i != 0) { | |
878 | --i; | |
879 | --wb; | |
880 | usb_buffer_free(acm->dev, acm->writesize, | |
881 | wb->buf, wb->dmah); | |
882 | } | |
883 | return -ENOMEM; | |
884 | } | |
885 | } | |
886 | return 0; | |
887 | } | |
888 | ||
1da177e4 LT |
889 | static int acm_probe (struct usb_interface *intf, |
890 | const struct usb_device_id *id) | |
891 | { | |
892 | struct usb_cdc_union_desc *union_header = NULL; | |
c4cabd28 | 893 | struct usb_cdc_country_functional_desc *cfd = NULL; |
c6dbf554 | 894 | unsigned char *buffer = intf->altsetting->extra; |
1da177e4 LT |
895 | int buflen = intf->altsetting->extralen; |
896 | struct usb_interface *control_interface; | |
897 | struct usb_interface *data_interface; | |
898 | struct usb_endpoint_descriptor *epctrl; | |
899 | struct usb_endpoint_descriptor *epread; | |
900 | struct usb_endpoint_descriptor *epwrite; | |
901 | struct usb_device *usb_dev = interface_to_usbdev(intf); | |
902 | struct acm *acm; | |
903 | int minor; | |
904 | int ctrlsize,readsize; | |
905 | u8 *buf; | |
906 | u8 ac_management_function = 0; | |
907 | u8 call_management_function = 0; | |
908 | int call_interface_num = -1; | |
909 | int data_interface_num; | |
910 | unsigned long quirks; | |
86478944 | 911 | int num_rx_buf; |
61a87adf | 912 | int i; |
1da177e4 | 913 | |
86478944 | 914 | /* normal quirks */ |
1da177e4 | 915 | quirks = (unsigned long)id->driver_info; |
86478944 ON |
916 | num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; |
917 | ||
918 | /* handle quirks deadly to normal probing*/ | |
1da177e4 LT |
919 | if (quirks == NO_UNION_NORMAL) { |
920 | data_interface = usb_ifnum_to_if(usb_dev, 1); | |
921 | control_interface = usb_ifnum_to_if(usb_dev, 0); | |
922 | goto skip_normal_probe; | |
923 | } | |
924 | ||
925 | /* normal probing*/ | |
926 | if (!buffer) { | |
898eb71c | 927 | err("Weird descriptor references\n"); |
1da177e4 LT |
928 | return -EINVAL; |
929 | } | |
930 | ||
931 | if (!buflen) { | |
932 | if (intf->cur_altsetting->endpoint->extralen && intf->cur_altsetting->endpoint->extra) { | |
898eb71c | 933 | dev_dbg(&intf->dev,"Seeking extra descriptors on endpoint\n"); |
1da177e4 LT |
934 | buflen = intf->cur_altsetting->endpoint->extralen; |
935 | buffer = intf->cur_altsetting->endpoint->extra; | |
936 | } else { | |
937 | err("Zero length descriptor references\n"); | |
938 | return -EINVAL; | |
939 | } | |
940 | } | |
941 | ||
942 | while (buflen > 0) { | |
943 | if (buffer [1] != USB_DT_CS_INTERFACE) { | |
944 | err("skipping garbage\n"); | |
945 | goto next_desc; | |
946 | } | |
947 | ||
948 | switch (buffer [2]) { | |
949 | case USB_CDC_UNION_TYPE: /* we've found it */ | |
950 | if (union_header) { | |
951 | err("More than one union descriptor, skipping ..."); | |
952 | goto next_desc; | |
953 | } | |
954 | union_header = (struct usb_cdc_union_desc *) | |
955 | buffer; | |
956 | break; | |
c4cabd28 ON |
957 | case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ |
958 | cfd = (struct usb_cdc_country_functional_desc *)buffer; | |
959 | break; | |
1da177e4 LT |
960 | case USB_CDC_HEADER_TYPE: /* maybe check version */ |
961 | break; /* for now we ignore it */ | |
962 | case USB_CDC_ACM_TYPE: | |
963 | ac_management_function = buffer[3]; | |
964 | break; | |
965 | case USB_CDC_CALL_MANAGEMENT_TYPE: | |
966 | call_management_function = buffer[3]; | |
967 | call_interface_num = buffer[4]; | |
968 | if ((call_management_function & 3) != 3) | |
969 | err("This device cannot do calls on its own. It is no modem."); | |
970 | break; | |
1da177e4 | 971 | default: |
c6dbf554 DB |
972 | /* there are LOTS more CDC descriptors that |
973 | * could legitimately be found here. | |
974 | */ | |
975 | dev_dbg(&intf->dev, "Ignoring descriptor: " | |
976 | "type %02x, length %d\n", | |
977 | buffer[2], buffer[0]); | |
1da177e4 LT |
978 | break; |
979 | } | |
980 | next_desc: | |
981 | buflen -= buffer[0]; | |
982 | buffer += buffer[0]; | |
983 | } | |
984 | ||
985 | if (!union_header) { | |
986 | if (call_interface_num > 0) { | |
898eb71c | 987 | dev_dbg(&intf->dev,"No union descriptor, using call management descriptor\n"); |
1da177e4 LT |
988 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); |
989 | control_interface = intf; | |
990 | } else { | |
898eb71c | 991 | dev_dbg(&intf->dev,"No union descriptor, giving up\n"); |
1da177e4 LT |
992 | return -ENODEV; |
993 | } | |
994 | } else { | |
995 | control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); | |
996 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); | |
997 | if (!control_interface || !data_interface) { | |
898eb71c | 998 | dev_dbg(&intf->dev,"no interfaces\n"); |
1da177e4 LT |
999 | return -ENODEV; |
1000 | } | |
1001 | } | |
1002 | ||
1003 | if (data_interface_num != call_interface_num) | |
dc0d5c1e | 1004 | dev_dbg(&intf->dev,"Separate call control interface. That is not fully supported.\n"); |
1da177e4 LT |
1005 | |
1006 | skip_normal_probe: | |
1007 | ||
1008 | /*workaround for switched interfaces */ | |
1009 | if (data_interface->cur_altsetting->desc.bInterfaceClass != CDC_DATA_INTERFACE_TYPE) { | |
1010 | if (control_interface->cur_altsetting->desc.bInterfaceClass == CDC_DATA_INTERFACE_TYPE) { | |
1011 | struct usb_interface *t; | |
898eb71c | 1012 | dev_dbg(&intf->dev,"Your device has switched interfaces.\n"); |
1da177e4 LT |
1013 | |
1014 | t = control_interface; | |
1015 | control_interface = data_interface; | |
1016 | data_interface = t; | |
1017 | } else { | |
1018 | return -EINVAL; | |
1019 | } | |
1020 | } | |
74da5d68 AS |
1021 | |
1022 | /* Accept probe requests only for the control interface */ | |
1023 | if (intf != control_interface) | |
1024 | return -ENODEV; | |
1da177e4 LT |
1025 | |
1026 | if (usb_interface_claimed(data_interface)) { /* valid in this context */ | |
898eb71c | 1027 | dev_dbg(&intf->dev,"The data interface isn't available\n"); |
1da177e4 LT |
1028 | return -EBUSY; |
1029 | } | |
1030 | ||
1031 | ||
1032 | if (data_interface->cur_altsetting->desc.bNumEndpoints < 2) | |
1033 | return -EINVAL; | |
1034 | ||
1035 | epctrl = &control_interface->cur_altsetting->endpoint[0].desc; | |
1036 | epread = &data_interface->cur_altsetting->endpoint[0].desc; | |
1037 | epwrite = &data_interface->cur_altsetting->endpoint[1].desc; | |
1038 | ||
1039 | ||
1040 | /* workaround for switched endpoints */ | |
45aea704 | 1041 | if (!usb_endpoint_dir_in(epread)) { |
1da177e4 LT |
1042 | /* descriptors are swapped */ |
1043 | struct usb_endpoint_descriptor *t; | |
898eb71c | 1044 | dev_dbg(&intf->dev,"The data interface has switched endpoints\n"); |
1da177e4 LT |
1045 | |
1046 | t = epread; | |
1047 | epread = epwrite; | |
1048 | epwrite = t; | |
1049 | } | |
1050 | dbg("interfaces are valid"); | |
1051 | for (minor = 0; minor < ACM_TTY_MINORS && acm_table[minor]; minor++); | |
1052 | ||
1053 | if (minor == ACM_TTY_MINORS) { | |
1054 | err("no more free acm devices"); | |
1055 | return -ENODEV; | |
1056 | } | |
1057 | ||
46f116ea | 1058 | if (!(acm = kzalloc(sizeof(struct acm), GFP_KERNEL))) { |
898eb71c | 1059 | dev_dbg(&intf->dev, "out of memory (acm kzalloc)\n"); |
1da177e4 LT |
1060 | goto alloc_fail; |
1061 | } | |
1da177e4 LT |
1062 | |
1063 | ctrlsize = le16_to_cpu(epctrl->wMaxPacketSize); | |
86478944 | 1064 | readsize = le16_to_cpu(epread->wMaxPacketSize)* ( quirks == SINGLE_RX_URB ? 1 : 2); |
e4cf3aa8 | 1065 | acm->writesize = le16_to_cpu(epwrite->wMaxPacketSize) * 20; |
1da177e4 LT |
1066 | acm->control = control_interface; |
1067 | acm->data = data_interface; | |
1068 | acm->minor = minor; | |
1069 | acm->dev = usb_dev; | |
1070 | acm->ctrl_caps = ac_management_function; | |
1071 | acm->ctrlsize = ctrlsize; | |
1072 | acm->readsize = readsize; | |
86478944 | 1073 | acm->rx_buflimit = num_rx_buf; |
61a87adf DK |
1074 | acm->urb_task.func = acm_rx_tasklet; |
1075 | acm->urb_task.data = (unsigned long) acm; | |
c4028958 | 1076 | INIT_WORK(&acm->work, acm_softint); |
11ea859d | 1077 | INIT_WORK(&acm->waker, acm_waker); |
e5fbab51 | 1078 | init_waitqueue_head(&acm->drain_wait); |
1da177e4 | 1079 | spin_lock_init(&acm->throttle_lock); |
884b600f | 1080 | spin_lock_init(&acm->write_lock); |
61a87adf | 1081 | spin_lock_init(&acm->read_lock); |
1365baf7 | 1082 | mutex_init(&acm->mutex); |
61a87adf | 1083 | acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); |
1da177e4 LT |
1084 | |
1085 | buf = usb_buffer_alloc(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); | |
1086 | if (!buf) { | |
898eb71c | 1087 | dev_dbg(&intf->dev, "out of memory (ctrl buffer alloc)\n"); |
1da177e4 LT |
1088 | goto alloc_fail2; |
1089 | } | |
1090 | acm->ctrl_buffer = buf; | |
1091 | ||
884b600f | 1092 | if (acm_write_buffers_alloc(acm) < 0) { |
898eb71c | 1093 | dev_dbg(&intf->dev, "out of memory (write buffer alloc)\n"); |
1da177e4 LT |
1094 | goto alloc_fail4; |
1095 | } | |
1da177e4 LT |
1096 | |
1097 | acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); | |
1098 | if (!acm->ctrlurb) { | |
898eb71c | 1099 | dev_dbg(&intf->dev, "out of memory (ctrlurb kmalloc)\n"); |
1da177e4 LT |
1100 | goto alloc_fail5; |
1101 | } | |
86478944 | 1102 | for (i = 0; i < num_rx_buf; i++) { |
61a87adf DK |
1103 | struct acm_ru *rcv = &(acm->ru[i]); |
1104 | ||
1105 | if (!(rcv->urb = usb_alloc_urb(0, GFP_KERNEL))) { | |
898eb71c | 1106 | dev_dbg(&intf->dev, "out of memory (read urbs usb_alloc_urb)\n"); |
61a87adf DK |
1107 | goto alloc_fail7; |
1108 | } | |
1109 | ||
1110 | rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1111 | rcv->instance = acm; | |
1112 | } | |
86478944 | 1113 | for (i = 0; i < num_rx_buf; i++) { |
672c4e18 | 1114 | struct acm_rb *rb = &(acm->rb[i]); |
61a87adf | 1115 | |
672c4e18 DB |
1116 | rb->base = usb_buffer_alloc(acm->dev, readsize, |
1117 | GFP_KERNEL, &rb->dma); | |
1118 | if (!rb->base) { | |
898eb71c | 1119 | dev_dbg(&intf->dev, "out of memory (read bufs usb_buffer_alloc)\n"); |
61a87adf DK |
1120 | goto alloc_fail7; |
1121 | } | |
1da177e4 | 1122 | } |
e4cf3aa8 DE |
1123 | for(i = 0; i < ACM_NW; i++) |
1124 | { | |
1125 | struct acm_wb *snd = &(acm->wb[i]); | |
1126 | ||
1127 | if (!(snd->urb = usb_alloc_urb(0, GFP_KERNEL))) { | |
1128 | dev_dbg(&intf->dev, "out of memory (write urbs usb_alloc_urb)"); | |
1129 | goto alloc_fail7; | |
1130 | } | |
1131 | ||
1132 | usb_fill_bulk_urb(snd->urb, usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), | |
1133 | NULL, acm->writesize, acm_write_bulk, snd); | |
1134 | snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1135 | snd->instance = acm; | |
1da177e4 LT |
1136 | } |
1137 | ||
c4cabd28 ON |
1138 | usb_set_intfdata (intf, acm); |
1139 | ||
1140 | i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); | |
1141 | if (i < 0) | |
1142 | goto alloc_fail8; | |
1143 | ||
1144 | if (cfd) { /* export the country data */ | |
1145 | acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); | |
1146 | if (!acm->country_codes) | |
1147 | goto skip_countries; | |
1148 | acm->country_code_size = cfd->bLength - 4; | |
1149 | memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, cfd->bLength - 4); | |
1150 | acm->country_rel_date = cfd->iCountryCodeRelDate; | |
1151 | ||
1152 | i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); | |
1153 | if (i < 0) { | |
1154 | kfree(acm->country_codes); | |
1155 | goto skip_countries; | |
1156 | } | |
1157 | ||
1158 | i = device_create_file(&intf->dev, &dev_attr_iCountryCodeRelDate); | |
1159 | if (i < 0) { | |
1160 | kfree(acm->country_codes); | |
1161 | goto skip_countries; | |
1162 | } | |
1163 | } | |
1164 | ||
1165 | skip_countries: | |
1da177e4 LT |
1166 | usb_fill_int_urb(acm->ctrlurb, usb_dev, usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), |
1167 | acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, epctrl->bInterval); | |
1168 | acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1169 | acm->ctrlurb->transfer_dma = acm->ctrl_dma; | |
1170 | ||
1da177e4 LT |
1171 | dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); |
1172 | ||
1173 | acm_set_control(acm, acm->ctrlout); | |
1174 | ||
1175 | acm->line.dwDTERate = cpu_to_le32(9600); | |
1176 | acm->line.bDataBits = 8; | |
1177 | acm_set_line(acm, &acm->line); | |
1178 | ||
1179 | usb_driver_claim_interface(&acm_driver, data_interface, acm); | |
672c4e18 | 1180 | usb_set_intfdata(data_interface, acm); |
1da177e4 | 1181 | |
83ef344a | 1182 | usb_get_intf(control_interface); |
1183 | tty_register_device(acm_tty_driver, minor, &control_interface->dev); | |
1da177e4 LT |
1184 | |
1185 | acm_table[minor] = acm; | |
1da177e4 | 1186 | |
c4cabd28 ON |
1187 | return 0; |
1188 | alloc_fail8: | |
e4cf3aa8 DE |
1189 | for (i = 0; i < ACM_NW; i++) |
1190 | usb_free_urb(acm->wb[i].urb); | |
1da177e4 | 1191 | alloc_fail7: |
830f4021 | 1192 | acm_read_buffers_free(acm); |
86478944 | 1193 | for (i = 0; i < num_rx_buf; i++) |
61a87adf | 1194 | usb_free_urb(acm->ru[i].urb); |
1da177e4 LT |
1195 | usb_free_urb(acm->ctrlurb); |
1196 | alloc_fail5: | |
884b600f | 1197 | acm_write_buffers_free(acm); |
1da177e4 | 1198 | alloc_fail4: |
1da177e4 LT |
1199 | usb_buffer_free(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); |
1200 | alloc_fail2: | |
1201 | kfree(acm); | |
1202 | alloc_fail: | |
1203 | return -ENOMEM; | |
1204 | } | |
1205 | ||
1365baf7 ON |
1206 | static void stop_data_traffic(struct acm *acm) |
1207 | { | |
1208 | int i; | |
11ea859d | 1209 | dbg("Entering stop_data_traffic"); |
1365baf7 ON |
1210 | |
1211 | tasklet_disable(&acm->urb_task); | |
1212 | ||
1213 | usb_kill_urb(acm->ctrlurb); | |
e4cf3aa8 DE |
1214 | for(i = 0; i < ACM_NW; i++) |
1215 | usb_kill_urb(acm->wb[i].urb); | |
1365baf7 ON |
1216 | for (i = 0; i < acm->rx_buflimit; i++) |
1217 | usb_kill_urb(acm->ru[i].urb); | |
1218 | ||
1365baf7 ON |
1219 | tasklet_enable(&acm->urb_task); |
1220 | ||
1221 | cancel_work_sync(&acm->work); | |
11ea859d | 1222 | cancel_work_sync(&acm->waker); |
1365baf7 ON |
1223 | } |
1224 | ||
1da177e4 LT |
1225 | static void acm_disconnect(struct usb_interface *intf) |
1226 | { | |
c4cabd28 | 1227 | struct acm *acm = usb_get_intfdata(intf); |
1da177e4 | 1228 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
1da177e4 | 1229 | |
672c4e18 DB |
1230 | /* sibling interface is already cleaning up */ |
1231 | if (!acm) | |
86067eea | 1232 | return; |
672c4e18 DB |
1233 | |
1234 | mutex_lock(&open_mutex); | |
c4cabd28 | 1235 | if (acm->country_codes){ |
74da5d68 AS |
1236 | device_remove_file(&acm->control->dev, |
1237 | &dev_attr_wCountryCodes); | |
1238 | device_remove_file(&acm->control->dev, | |
1239 | &dev_attr_iCountryCodeRelDate); | |
c4cabd28 | 1240 | } |
74da5d68 | 1241 | device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); |
1da177e4 | 1242 | acm->dev = NULL; |
86067eea ON |
1243 | usb_set_intfdata(acm->control, NULL); |
1244 | usb_set_intfdata(acm->data, NULL); | |
1da177e4 | 1245 | |
1365baf7 | 1246 | stop_data_traffic(acm); |
1da177e4 | 1247 | |
884b600f | 1248 | acm_write_buffers_free(acm); |
1da177e4 | 1249 | usb_buffer_free(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); |
830f4021 | 1250 | acm_read_buffers_free(acm); |
1da177e4 | 1251 | |
830f4021 ON |
1252 | usb_driver_release_interface(&acm_driver, intf == acm->control ? |
1253 | acm->data : acm->control); | |
1da177e4 LT |
1254 | |
1255 | if (!acm->used) { | |
83ef344a | 1256 | acm_tty_unregister(acm); |
4186ecf8 | 1257 | mutex_unlock(&open_mutex); |
1da177e4 LT |
1258 | return; |
1259 | } | |
1260 | ||
4186ecf8 | 1261 | mutex_unlock(&open_mutex); |
1da177e4 LT |
1262 | |
1263 | if (acm->tty) | |
1264 | tty_hangup(acm->tty); | |
1265 | } | |
1266 | ||
35758589 | 1267 | #ifdef CONFIG_PM |
1365baf7 ON |
1268 | static int acm_suspend(struct usb_interface *intf, pm_message_t message) |
1269 | { | |
1270 | struct acm *acm = usb_get_intfdata(intf); | |
11ea859d ON |
1271 | int cnt; |
1272 | ||
1273 | if (acm->dev->auto_pm) { | |
1274 | int b; | |
1275 | ||
1276 | spin_lock_irq(&acm->read_lock); | |
1277 | spin_lock(&acm->write_lock); | |
1278 | b = acm->processing + acm->transmitting; | |
1279 | spin_unlock(&acm->write_lock); | |
1280 | spin_unlock_irq(&acm->read_lock); | |
1281 | if (b) | |
1282 | return -EBUSY; | |
1283 | } | |
1284 | ||
1285 | spin_lock_irq(&acm->read_lock); | |
1286 | spin_lock(&acm->write_lock); | |
1287 | cnt = acm->susp_count++; | |
1288 | spin_unlock(&acm->write_lock); | |
1289 | spin_unlock_irq(&acm->read_lock); | |
1365baf7 | 1290 | |
11ea859d | 1291 | if (cnt) |
1365baf7 ON |
1292 | return 0; |
1293 | /* | |
1294 | we treat opened interfaces differently, | |
1295 | we must guard against open | |
1296 | */ | |
1297 | mutex_lock(&acm->mutex); | |
1298 | ||
1299 | if (acm->used) | |
1300 | stop_data_traffic(acm); | |
1301 | ||
1302 | mutex_unlock(&acm->mutex); | |
1303 | return 0; | |
1304 | } | |
1305 | ||
1306 | static int acm_resume(struct usb_interface *intf) | |
1307 | { | |
1308 | struct acm *acm = usb_get_intfdata(intf); | |
1309 | int rv = 0; | |
11ea859d | 1310 | int cnt; |
1365baf7 | 1311 | |
11ea859d ON |
1312 | spin_lock_irq(&acm->read_lock); |
1313 | acm->susp_count -= 1; | |
1314 | cnt = acm->susp_count; | |
1315 | spin_unlock_irq(&acm->read_lock); | |
1316 | ||
1317 | if (cnt) | |
1365baf7 ON |
1318 | return 0; |
1319 | ||
1320 | mutex_lock(&acm->mutex); | |
1321 | if (acm->used) { | |
1322 | rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO); | |
1323 | if (rv < 0) | |
11ea859d | 1324 | goto err_out; |
1365baf7 ON |
1325 | |
1326 | tasklet_schedule(&acm->urb_task); | |
1327 | } | |
1328 | ||
1329 | err_out: | |
1330 | mutex_unlock(&acm->mutex); | |
1331 | return rv; | |
1332 | } | |
35758589 ON |
1333 | |
1334 | #endif /* CONFIG_PM */ | |
1da177e4 LT |
1335 | /* |
1336 | * USB driver structure. | |
1337 | */ | |
1338 | ||
1339 | static struct usb_device_id acm_ids[] = { | |
1340 | /* quirky and broken devices */ | |
1341 | { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ | |
1342 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1343 | }, | |
b0e2a705 AA |
1344 | { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ |
1345 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1346 | }, | |
8753e65e MO |
1347 | { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ |
1348 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1349 | }, | |
91a9c921 CM |
1350 | { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ |
1351 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1352 | }, | |
86478944 ON |
1353 | { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ |
1354 | .driver_info = SINGLE_RX_URB, /* firmware bug */ | |
1355 | }, | |
3dd2ae81 ON |
1356 | { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ |
1357 | .driver_info = SINGLE_RX_URB, /* firmware bug */ | |
1358 | }, | |
9be8456c ON |
1359 | { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ |
1360 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1361 | }, | |
6149ed5e IM |
1362 | { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ |
1363 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1364 | }, | |
c8fd2c37 ES |
1365 | { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ |
1366 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ | |
1367 | }, | |
9be8456c | 1368 | |
1da177e4 LT |
1369 | /* control interfaces with various AT-command sets */ |
1370 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1371 | USB_CDC_ACM_PROTO_AT_V25TER) }, | |
1372 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1373 | USB_CDC_ACM_PROTO_AT_PCCA101) }, | |
1374 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1375 | USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, | |
1376 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1377 | USB_CDC_ACM_PROTO_AT_GSM) }, | |
1378 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1379 | USB_CDC_ACM_PROTO_AT_3G ) }, | |
1380 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, | |
1381 | USB_CDC_ACM_PROTO_AT_CDMA) }, | |
1382 | ||
1383 | /* NOTE: COMM/ACM/0xff is likely MSFT RNDIS ... NOT a modem!! */ | |
1384 | { } | |
1385 | }; | |
1386 | ||
1387 | MODULE_DEVICE_TABLE (usb, acm_ids); | |
1388 | ||
1389 | static struct usb_driver acm_driver = { | |
1da177e4 LT |
1390 | .name = "cdc_acm", |
1391 | .probe = acm_probe, | |
1392 | .disconnect = acm_disconnect, | |
35758589 | 1393 | #ifdef CONFIG_PM |
1365baf7 ON |
1394 | .suspend = acm_suspend, |
1395 | .resume = acm_resume, | |
35758589 | 1396 | #endif |
1da177e4 | 1397 | .id_table = acm_ids, |
35758589 | 1398 | #ifdef CONFIG_PM |
1365baf7 | 1399 | .supports_autosuspend = 1, |
35758589 | 1400 | #endif |
1da177e4 LT |
1401 | }; |
1402 | ||
1403 | /* | |
1404 | * TTY driver structures. | |
1405 | */ | |
1406 | ||
b68e31d0 | 1407 | static const struct tty_operations acm_ops = { |
1da177e4 LT |
1408 | .open = acm_tty_open, |
1409 | .close = acm_tty_close, | |
1410 | .write = acm_tty_write, | |
1411 | .write_room = acm_tty_write_room, | |
1412 | .ioctl = acm_tty_ioctl, | |
1413 | .throttle = acm_tty_throttle, | |
1414 | .unthrottle = acm_tty_unthrottle, | |
1415 | .chars_in_buffer = acm_tty_chars_in_buffer, | |
1416 | .break_ctl = acm_tty_break_ctl, | |
1417 | .set_termios = acm_tty_set_termios, | |
1418 | .tiocmget = acm_tty_tiocmget, | |
1419 | .tiocmset = acm_tty_tiocmset, | |
1420 | }; | |
1421 | ||
1422 | /* | |
1423 | * Init / exit. | |
1424 | */ | |
1425 | ||
1426 | static int __init acm_init(void) | |
1427 | { | |
1428 | int retval; | |
1429 | acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); | |
1430 | if (!acm_tty_driver) | |
1431 | return -ENOMEM; | |
1432 | acm_tty_driver->owner = THIS_MODULE, | |
1433 | acm_tty_driver->driver_name = "acm", | |
1434 | acm_tty_driver->name = "ttyACM", | |
1da177e4 LT |
1435 | acm_tty_driver->major = ACM_TTY_MAJOR, |
1436 | acm_tty_driver->minor_start = 0, | |
1437 | acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, | |
1438 | acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, | |
331b8319 | 1439 | acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
1da177e4 LT |
1440 | acm_tty_driver->init_termios = tty_std_termios; |
1441 | acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
1442 | tty_set_operations(acm_tty_driver, &acm_ops); | |
1443 | ||
1444 | retval = tty_register_driver(acm_tty_driver); | |
1445 | if (retval) { | |
1446 | put_tty_driver(acm_tty_driver); | |
1447 | return retval; | |
1448 | } | |
1449 | ||
1450 | retval = usb_register(&acm_driver); | |
1451 | if (retval) { | |
1452 | tty_unregister_driver(acm_tty_driver); | |
1453 | put_tty_driver(acm_tty_driver); | |
1454 | return retval; | |
1455 | } | |
1456 | ||
1457 | info(DRIVER_VERSION ":" DRIVER_DESC); | |
1458 | ||
1459 | return 0; | |
1460 | } | |
1461 | ||
1462 | static void __exit acm_exit(void) | |
1463 | { | |
1464 | usb_deregister(&acm_driver); | |
1465 | tty_unregister_driver(acm_tty_driver); | |
1466 | put_tty_driver(acm_tty_driver); | |
1467 | } | |
1468 | ||
1469 | module_init(acm_init); | |
1470 | module_exit(acm_exit); | |
1471 | ||
1472 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1473 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1474 | MODULE_LICENSE("GPL"); | |
1475 |